Apparatus for shaking out castings



June 26, 1923.

H. c.v WATSON APPARATUS FOR SHAKING OUT CASTINGS 4 Sheets-Sheet l 'FiledMay 22 1920' Gttozneg June 26, 1923.

H. C. WATSON APPARATUS FOR SHARING OUT CASTINGS 4 Sheets-Sheet 2 FiledMay 22 1920 gnam/Hoz June 26, 1923.

. H. c. WATSON APPARATUSFOR SHAKING OUT CASTINGS Filed May 22, 1920 4Sheets-Sheet 5 June 26, 1923. A 1,460,085

- H. c. WATSON APPARATUS FR SHAKING OUT CASTINGS Filed May 242 1920 4Sheets-Sheet 4 EL v gnam/m, www

Patented .lune 26, 1923.

1,413,985 ETEN? Gli.

HARRY C. WATSONQ F CANTON, OHIO. r

APPARATUS FOR SHAKING OUT CASTINGS.

Application mea May a2, 1920. serial Naasasaa my invention.

Figure 2 is a section on the line II-11 of Figure 1.

Figure 3 is a sectional plan view, partly broken away, of a portionofthe actuating mechanism, and

Figure 4 isa section on the lineIV-IV of Figure 3. y

My invention has relationtoy apparatus for shaking out castings from thesand in which they are cast; and is designed to provide an efficient andconvenient apparatus by means of which the work may beefi'cientlyperformed in a manner which will not injure either the castingsor theflask in which the sand moldsl are made.

My invention also. provides .a machine or apparatus of this character,by means of which a plurality of castings may be shaken out at the sametime. `1n its preferred form, it also provides a machine or apparatus ofthis character in which either a portion of the shaking out table, orthe entire table may be utilized at any particular time for shaking outoperations, thus permitting the capacity of the apparatus to be variedin accordance with requirements, and also per mitting one portion of thetable to be used in shaking out while the other side is being unloadedand reloaded.

My invention also provides means whereby the sand and dirt shaken fromthe castings is readilytaken care of and removed.

The nature of my invention will be best understood by reference to theaccompanying drawings in which I have shown a preferred embodiment of myinvention and which will now be described, it being premised, however,that various changes can be made in the details of construction,arrangement and combination of the various parts without departing fromthe spirit and scope o f my invention as defined inthe appended claims.

In' these drawings, I havey illustrated a shaking out table comprising aseries of spaced, parallel, longitudinallyI extending bars 2 which arefixedly secured to any suitable bed or foundation, such as indicated at3. 4 designate vertically movable bars which are placed in alternatingrelation to the bars 2 and which are adapted to be actuated to raise thecastings to be shaken out and drop themback upon the table ina mannerlto give .an eective shaking out action. These bars are pivoted at5beyond the rear end of thetable and are actuated by mechanismsuch as nowto be described.

6 designates an electric motor whose armature shaft 7 "is coupled to adrive shaft 8 (see Figure 3) through a suitable coupling 9 which ispreferably of a non-rigid or semiresilient character.y Theshaft V8carries a worm 10 which meshes with a worm wheel 11 on a transverseshaft 12 also having two spaced apart spur toothed pinions 13. Thesepinions mesh, respectively, with two gear wheels 14 which are sleevedupon opposite end portions of a crank shaft 15. The inner y faces of thegears 14 are cut away circularly concentrically with the axis of thecrank shaft, as indicatedv atl, these cutaway portions being adapted'yto partially receive therein the segmental cheek members 17 betweenwhich is formed the crank pin 18. The outer ends of the cheek members 17are curved to conform approximately to the inner periphery of thecutaway portion 16.

Eachv of these cutaway portions is kprovided with a projection 18l whichis designed to engage the adjacent cheek piece and thereby form adriving connection for the crank shaft .throughout a portion of therevolution of the gear wheel 14.

The crank pin 18`is connected by a pity' man 19 with an arm 20 on thetransverse rocker shaft 21. This shaft also carries, at opposite sidesof the arm 20, two rocker arms 22 which are loosely sleeved on the shaft21 and are designed to be connected ythereto throughthe medium of therespec* tive clutches 23. The movable member of eachof these clutches isarranged to be moved into and out of clutching engagement with theclutch portion ,of the arm 22 by any suitable means such as the handoperated screw shaft 24. One of these clutches with a portion of itsactuating screw shaft is shown in detail in Figure 3.

25 designate pairs of links which connect the machine' started. During aportion of i the rocker arms I22 with three armed bell crank levers 26of a second rocker shaft 27, which is cut in two, intermediate the twosetsof connections 25. The links 25 are ar ranged in pairs both aboveand below thel shafts 21 and 27 in the manner shown in Figures 1 and 2.The third arm of each bell crank 26 is connected by a link 28 to theadjacent end of one of the shaker bars 4 before described.

29 designates flooring placed below the shaking out table and which isinclined downwardly and centrally in the manner of a hopper to adischarge opening 8O which is arranged to discharge the sand and dirtvshaken from the castings onto any suitable conveyer, such as theendless conveyer indicated at 31. Y i,

The operation is as follows:

The sand molds containing the castings to be shaken out are placed uponthe table and each revolution of the gears 14 the projections 18athereof will engage one of the cheek members of the crank shaft 15 inthe manner shown in Figure 4 to vform a driving engagement therewith.The connections between the shaft 15 vand the vertically movable shakerbars 4 are so arranged that during this portion of the movement of thegearing,

which is substantially 180 degrees of rotation thereof, said shaker barswill be raised to their uppermost positions. The crank pin 18 will thenhave passed its upper center, and the weight of the castings and sand onthe bars 4 will cause said bars to drop, the crank pin 18 during thisdropping movement running ahead of the. gear wheels 14 so that the crankshaft williremain stationary until the projections 18a again catch upand come into contact with the cheek members 17. This sudden dropping ofthe shaker bars 4 to the level of the fixed bars 2 entirely under theaccelerative effect of gravity, causes a very effective jarring movementto be eX- erted upon the sand and castings. This mechanismv produces atrue gravity drop ,such as occurs in freely falling bodies, modi-` liedonly by the friction in the mountings of the mechanism which come intoplay at this time. The sand and dirt thus shaken from the castings fallthrough the table onto the flooring 29 and thence to the conveyer 31, bywhich it is removed to any desired point.

By means ofthe clutches 23 before described, it will be readily seenthat either one or bothsections of the table may be used simultaneouslyfor shaking out operations, depending upon the capacity required. Thisalso permits one section of the table to be used in shaking out, whilepreviously shaken out castings are being unloaded from the othersections Vand a new load of castings is being placed thereon. i

The Ina-chine ory apparatus islsimple and positive in its constructionand mode of operation, and exerts a shaking operation of a characterwhich will not injure either the castings or flasks which may be`contained in the said molds. Its use enables a large number ofcastings, particularly relatively small castings, to be shaken out atthe same time, thus enabling the shaking out operations to be rapidlyperformed.

I claim: i

1. Apparatus for shaking out castings, comprising a table having aseries of spaced fixed bars, and a series of alternating verticallymovable bars, together with actuating connections for "the movable bars,said con- :sections being operative to produce a posi-k tive raising ofthe movable bars and then inoperative to permit a substantially truegravity drop thereof independently of further movement of saidconnections, substantially as described. y

2. Apparatus for shaking out castings, comprising a table having aseries of spaced fixed bars, and a series of alternating verticallymovable bars, together with actuating connections for the movable bars,said actuating connections having means for raising said bars and thenpermitting them to drop independently of further movement of saidconnections under the weight of the load thereon, substantiallyasdescribed.

' 3. Ak shaking out table for castings, comprising a series of fixedbars, a series of vertically movable bars, an endless take-off conveyerbelow the table, and means for directing the sand and dirt shaken fromthe castings to said conveyer, substantially as described. l y

4. A shaking out table having a series of vertically movable shakingbars, a rocker shaft having actuating connections with said bars, andmeans for positively actuating said rocker shaft in one direction andpermitting said shaft to turn in the reverse direction entirely underthe action of the load on said bars independently of further movement ofsaid means after the rocker shaft has completed its movement in onedirection, substantially as described.

5. A shaking out table having a plurality of vertically movable shakingbars, a rocker shaft having actuated connections with said bars, a crankshaft, actuating connections betweenthe crank shaft and rocker shaft,yand gearing for actuating the crank shaft, said gearing having aconnectionwith the crank shaft which will permit .the latter to moveahead of the gea-ring during a portion of each revolution of thegearing.

6. Apparatus for shaking out castings, comprising vertically movableshaker bars, a crank shaft having actuating connections with said bars,a pair of gears loosely sleeved on said crank shaft at opposite .sidesofrits crank pin, means for positively actuating said gears, and drivingconnections between the gears vand the crank shaft which will permit thecrank shaft to move independently of the gears during a portion of eachrevolution of the gears,` substantially as described.

7. Shaking out apparatus, Vcomprising a shaking out table having aplurality of vertically movable shaking bars, and a single means havingoperative connections for simultaneously actuating all or only a por`tion of said bars, substantially as described. 8. A shaking out tablehaving a plurality of vertically movable shaking bars, a rocker shaft,said shaft being formed in two sections, actuating connections betweensaid shaft and the shaking bars, and a single means whereby either orboth of said sections may be actuated, substantially as described.

9. A shaking out table having a plurality of vertically movable shakingbars, a rocker shaft having actuating connections with said bars, acrank shaft, actuating connections between the crank shaft and rockershaft, and

shaft which is eective only during one-half of the revolution of thecrank shaft therev by permitting the crank shafttomove ahead of thegearing during the remainder of each revolution thereof, substantiallyas described.

10. Apparatus for shaking out castings, comprising a table having aseries of spaced lixed bars, and a series of alternating verticallymovable bars, together with actuating connections for the movable bars,and rotary means effective during one-half of each rotation thereof forpositively operating said actuating connections for raising said bars,and thenpermitting said bars to drop independently of saidconnectionsunder the weight of the load thereon, substantially asdescribed. f

In testimony whereof, I have hereunto set my hand.

I-L/ XRRY` C. WATSON.

